公开(公告)号：WO2011048134A1

公开(公告)日：2011-04-28

申请号：PCT/EP2010065782

申请日：2010-10-20

Applicant: BASF SE ,  SCHNEIDER CHRISTIAN ,  ZAFRED NIKOLAUS ,  HESSLER ANDREAS ,  DENISSEN LEO ,  KOENIGSMANN LUCIA

Inventor： SCHNEIDER CHRISTIAN ,  ZAFRED NIKOLAUS ,  HESSLER ANDREAS ,  DENISSEN LEO ,  KOENIGSMANN LUCIA

IPC: C07C209/36 ,  C07C211/46 ,  C07C265/14

CPC classification number: C07C265/14 ,  C07C209/36 ,  C07C211/46

Abstract: What is proposed is a process for preparation and distillative processing of diphenylmethane diisocyanate (MDI), proceeding from a benzene-containing feed stream, wherein, in a catalytic hydrogenation of nitrobenzene to aniline, steam is generated at two different pressure levels, which covers some or all of the energy demand for the overall process, by using two fluidized bed reactors of identical design, a first fluidized bed reactor being operated with an aniline charge for which the fluidized bed reactors were designed and providing steam at a first, lower pressure level, and a second fluidized bed reactor being operated with a charge reduced with respect to the first fluidized bed reactor to such an extent that the second fluidized bed reactor provides steam at the higher pressure level.

Abstract translation: 一种方法，提出了通过二苯基甲烷二异氰酸酯（MDI）的蒸馏的制备和后处理，开始从在硝基苯的催化氢化在两个不同的压力水平，以苯胺蒸汽被产生的苯的进料流含有，整个过程的能量需求部分地或完全 覆盖由两个相同的流化床反应器的使用，其特征在于， - 一个第二流化床反应器相对于所述第一流化床反应器，只要降低的负载 - 第一流化床反应器与用于所述流化床反应器已经被设计和蒸汽供应到第一苯胺负载，低压级，并操作 动作，以使所述第二流化床反应器在较高压力级提供蒸汽。